Silencer and condenser for gasolene-engines.



l. E. DALEY.

srLENcEH AND coNoENsER FOR GASOLENE ENGINES.

APPLICATION FILED MAY 24, 1916.

Patented May 29, 1917.

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J AMES ERNEST DALEY, OF PORT ANSON, ONTARIO, CANADA.

SII-.IENG'ER AND CONDENSER FOR GASOLENE-ENGINES.

Specification of Letters Patent.

Patented May 29, 1917.

App1ication led May 24,1916. Serial No. 99,697.

To all whom t may concern:

Beit known that LJ Anus EnNns'r DALEY, a citizen of Canada, residing at ort Anson, in the ProvinceA of Ontario, Dominion of Canada, have invented a new and useful Silencer and Condenser for GrasOlene-Engines; and I 'do hereby declare the following tov be a fulh'clear, and exact description of the invention, such as will enable others skilled Iin the art kto. which it appertains to make anduse thesame.

Thel present invention relates to an improved silencer and condenser for receiving the exhaust gases of an internal combustion engine, the object of the invention being to provide a device of this character which embodies novel features of construction whereby back pressure is avoided and the gases permitted to expand and be dis' charged in a practically noiseless manner.

Further objects of the invention are to provide a device of this character which is comparatively simple and inexpensive in its construction, which provides successive expansion chambers having resilient wallswhich are adapted to flex in and out under the'pulsations of pressure and thereby permit the exhaust gases to be acted upon without producing back pressure in the engine, and which has no delicate parts such as would become clogged with soot and interfere with the proper operation of the silencer after a very brief period of use.

With these and otherobjects in view, the invention consists in certain novel combinations and arrangements of the parts `as will ed out in the appendedfclaims.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawing, in whichz Figure 1 is a longitudinal sectional view through a silencer and condenser constructed in accordance with the invention, showing the same as applied to the hull of a vessel.

Fig. 2 is a transverse sectional view through the same.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the drawings, which illustrate one embodiment of the invention, the

reference character 1 designates the planking of the hull of a marine vessel, fragmentary parts only of which are shown. Arranged upon the inside of the hull is an outer casing or water jacket 2, preferably cylindrical in shape, the side of the said outer casing which litsvagain'st the planking 1 being formed with a longitudinal slot 3k which extends the full length of the casing and registers with a corresponding slot in the planking l. An inner casing 4L, also preferably cylindrical inr shape, is arranged within the outer casing 2, a water space 5 extending completely around the inner easing l.. Arranged within the inner casing di is a series of resilient partition members G which subdivide the same into a series 0f successively intercommunieating chambers 7 8, 9, 10 and 11, the inner expansion chamber 7 receiving the exhaust gases direct from the engine through the pipe 12 which enters one end of the casing 4L, while the gases lare finally discharged from the outer chamber 11 lthrough the discharge pipe 13. Each of the' resilient partitions 6 may be conveniently formed by rolling a piece of sheet metal into substantially cylindrical shape, the ledges'of the rolled sheet having an oif'erlapping and slightly spaced relation, andthe ends of the rolled sheets being slightly spaced from the ends of the inner casing 4:. The backs of the rolled sheets G are engaged by bolts 14 which pass through the casing 4t and water jacket 2, suitable spacing collars 15 being interposed between the various members to'hold them in a propmore fully appear as the description proceeds, the novel features thereof being pointerly spaced relation'.- Nuts 16 are screwed upon the extremities of the bolts 14C and provide a means for clamping all of the parts securely together. Arms 17 may be provided at suitable intervals .between the inner casing 4 and the water 'jacket 2 to hold the inner casing properly centered within the water jacket. The exhaust pipe 12 is preferably larger' in diameter than the discharge pipe 13, and the overlapping of the free edges of the rolled partitions 6 preferably increases successively from the inner partition 6 to the outer partition G.

There will be violent pulsations of the exhaust gases of the engine as they enter the inner expansion chamber 7 through the exhaust pipe 12. The resilient walls 6 of this inner expansion chamber 7 will be fiexed in and out by the variations of pressure, while the gases will escape through the overlapping edges of the inner partition 6, and around the ends thereof, into the next expansion chamber 8. Here the operation Will be repeated, although the pulsations will be less violent. The exhaust gases Will thus pass successively through the various expansion chambers 7, 8, 9, l() and ll, the Vresilient Walls of each of the inner chambers flexing to accommodate the variations or pulsations of pressure, and these pulsations of pressure becoming successivelyless violent in the different expansion chambers, until the gases are linally discharged through the pipe 13 in a low pressure and .nearly constant stream. 7When the exhaust gases reach the outer expansnin chamber ll they will be brought into contact with the walls of the casing l which are cooled by the surrounding` Water, so that a practically noiseless discharge of the exhaust gases is obtained, and practically no back pressure is produced upon the engine.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is zl. A silencer and condenser for internal combustion engines, including an outer casing having an inlet and an outlet, a rolled resilient sheet arranged within the outer casing and rigidly supported therein at an intermediate point in its length, the edges and ends of the rolled sheet being free so that the ends of the sheet Will flex under the pulsations of pressure.

2. A silencer and condenser for internal combustion engines, including an outer casing having an inlet and an outlet, a rolled resilient sheet arranged Within the outer casing and having the free ends thereof spaced from and overlapping each other, said rolled sheet being rigidly supported at an intermediate point in its length With the edges and ends thereof left free so that the ends of the sheet Will flex under pulsations of pressure.

3. A silencer and condenserl for internal combustion engines, including an outer casing having an inlet and an outlet, a series of rolled resilient sheets nested Within each other and arranged Within the outer casing" to provide a succession of vexpansion chambers through which the exhaust gases pass before being discharged, the free edges of the rolled sheets overlapping each other and having a spaced relation, and means for rigidly supporting the rolled sheets at intermediate points in the length thereof with the edges and ends of the sheets free to flex, said ends of the sheets flexing under the pulsations of pressure when the device is in operation.

l. A silencer and condenser for internal combustion engines, including an outer casing having an inlet and an outlet, a series of rolled resilient sheets nested Within each other and arranged Within the outer casing to provide a succession of expansion chainbers through which the exhaust gases must pass before being discharged, the free edges of the rolled sheets overlapping each other and the overlapping of the edges increasing successively from the inner rolled sheet to the outer rolled-sheet, and means for rigidly supporting the rolled sheets at intermediate points in the length thereof with the ends thereof free to flex, said ends of the rolled sheets flexing under the pulsations of pressure when the device is in operation.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JAMES ERNEST DALEY.

Vitnesses:

B. GORDON WATSON, THOMAS J. DALEY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, I). G. 

